Tool.



D. W. EDWARDS.

TOOL.

APPLICATION FILED APR.19,1913.

1,105,553. Patented July 28,1914,

I -7) 0t 0 4/ filth 71127 y/A 93mm 1/0 80W UNITED STATES PATENT OFFICE.

DANIEL W. EDXVARDS. OF ROCKFORD. ILLINOIS. ASSIGNOR TO GREENLEE BROS. & COMPANY, OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

TOOL.

To all whom it may concern Be it known that I DANIEL \V. EDWARDS, a citizen of the United States, residing at Rockford. in the county f Winnebago and State of Illinois. ha invented certain new and useful ln'iproveincnts in Tools, of which the following is a specification.

This invention relates to tools such as are adapted to he carried in a rotatable chuck.

The object of the invention is to construct a tool having a novel form of shank whereby the shank may he held fixedly in a working position in such chucks.

In the accompanying drawings, Figure 1 is a side view of my improved tool shank as applied to an anger hit. Fig. 2 is a plan section on the line E2---2 of Fig. 1.

My improved tool shank is illustrated in combination with a boring tool or anger bit 3. The shank of the tool 1 is cylindrical in shape and has formed thereon. intermediate its end and the hit portion, a head or enlargement 5. This head is formed with two parallel sides (3, flash with the side of the shank, the ends 7 of the head being curved concentric with the slank. The shank is thus Formed with two opposite lateral extensi n each ext nsion hav ng! longitudinally pposite shouli'hgrs or aliutmcnts 8.

The shank of the tool, when in ope 'ation, will he inserted into the socket. of a chuck adapted to carry a tool of this description. The cylindrical end shank portion of the tool is adapted to be located in a cylindrical Specification of Letters Patent.

Application filed April 19, 1913.

Patented July 28, 1914. Serial No. 762,401.

bore in a chuck to hold the tool concentric with the chuck and from lateral displacement the sides 6 are ada ited to be contacted hy sides of a chuck to hold the tool fixed rotatable therewith; and the shoulders 8 are to ahut fixed surfaces in a chuck to hold the tool from displa ement longitudinally in either direction. Thus it, will be seen that the shaak itself affords means for being retained lixcd securely within a chuck. fixed against all such forces as would tend to displace it therefrom. Also, it is evident that the shape and size of the lateral extension of the shank may he varied to suit dcviations in chuck construction without departing from the scope of my claim, but still retaining the essential holding surfaces for maintaining it concentric, from rotation and from longitudinal displacement.

I claim as my invention.

A boring tool having a cylindrical shank formed intermediate its ends with one or more lateral extensions which have longitudinally spaced ahutincntls and have opposite sides substantially tangent. with said shank sides.

In testimony whereof I have here nto set my hand in presence of two subscribing wit nessses.

DANIEL W. EDWARDS.

Witnesses:

E. BEHEL, JOHN F. MCCANNA, Jr. 

